Rotate your shoes. If you see a great deal on shoes—maybe on a big discount day like Black Friday or Amazon Prime Day—consider buying two similar pairs. Then you can rotate between them, giving the foam a chance to decompress between uses. “That midsole foam is going to have air mixed into the foam, and when you’re walking on it, it’s compressing, forcing that air out” Ray says. “The more time the shoe has to rest, the more that air can come back in and it can regain its original shape.” That’s not only good for your feet, but it can extend the life of both shoes.